Self-starting die-machine.



G. H JOSLIN.

SELF STARTING DIE MAcmNE.

APPUCATION FiLED JUNE 25,19I5.

Patented July 11, 1916.

2 SHEETS-SH? i.

G. H. JOSLIN.

SELF STARTING DIE, MACHINE.

APPLICATION FILED JUNE 25. 1915.

1,190,768. PatentedJuly 11,

2 SHEETS-SHEET GEORGE Lies-1am, or wanna; Hausa, INDiIAN-A'v' s'nnr 's'ran'rmo *mnmecrunna To all whom it may gq-n."

Beit known that l GEORGE H. JOSLIN, a citizen .of the-. ;Un i'ted States, residing at Terre, Haute; in tl e county of. Yigo and State of Indiana, hare invented new and useful' ihiprovements :in Self-Starting Die- Machines, of which the following is aspecification.

Theinvention relates to, a threading maoperates the die head and feeds the same'in accordance with the pitch desired is adapted for cooperation with anyone of a plurality of feeding means in the form of split 'nut-s each having a distinct thread-passage, so that the screw is fed directly -inaccordance with the particular selected thread passage.

The invention in the preferred fOlliJ of details will be described in the following specitication, reference being had particularly tr the accompanying drawings, in which:

Figure 1 is' a view'in elevation of the machine; Fig. 2 is a longitudinal section of the same; Fig. 3 is a plan of thedevice; Fig. l is a perspective view of one of the split nuts with its holding means. i

In the accompanying drawings wherein I have shown the preferred form of machine and one particularly adapted for hand power, 1 represents av base frame including uprights 2 and 3, the former supporting a bearing 4 for the diehead spindle 5 and the latter supporting the starting screw 6, as will later appear.

The upright 3 also is formed to provide a bearing for a driving shaft '7 which extends longitudinally of the frame and is terminall y provided adjacent the npright 2 with a pinion 8 adapted to mesh w th the internal teeth 9 of a gear 10. The spindle 5 is rotatablv and slidably mounted in the bearing 5, being provided at its outer end with a die head 11. The spindle is formed with a longitudinal key way 12- and the gear 10 is keyed thereon at 1 so as to permit independent longitudinal movement the U. spindle while preventing independent rotative movement.

emanates Sam 25', 1 915 I The upright 15 terminates a1 term in a head 1 1 longitudinally cored to receivethe starting screw '6. The head 14. is formed witlra plurahty'of transverse channels or opemngs 15, the said openings extending from side to side-through. the 'headand I through the top, a cover platelf} being secured upon the top of the-head? The inner or rear end of thespindle is-forme'drwith" a socket 17 of annular "form in cross section and the starting screw 6 has 18 to fit the socket.

The starting screw is formed at different places throughout its length with a series of externally arranged threads 19, 20 and 21, these threads being of a distinctly dif-' ferent pitch. Mounted in each of the openings 15 are feeding nuts 22 having internally threaded bores, as shown. Each nut is threaded in direct accordance with the pitch of the threaded section ofthe starting screw.

immediately a'djacent'thereto. The nuts are in two. halves, that is, divided vertically through the bore and are additionally formed with vertically extending-openings 23. A locking means in theform of a stirrup 24 is formed to engage each of the nuts, the spread of the stirrup prongs'being such that when the prongs thereof engage in the openings 23 the sections of the particularnut will be so spaced as to prevent its cotiperation-withthe threads on the shaft, while when the prongs, straddle the nut sections I and engage the outer surface of such sections the nut will be clampedor held in threaded cooperation with the shaft. -The cross bars of the stirrups rest upon the cover plate 16.

From the above description it will be obvious that through the rotation of the drive shaft the spindle 5 will be operated, and that when the nut having the desired pitch of thread clamped in position to cooperate with the threads on the starting shaft, the latter in the rotation of the spindlewill be forced forward carrying thespindle with it, the feed being in strict accordance with the pitch of the feeding nut. As a plurality of surh feeding nuts, any desired number being contemplated are used, it is of course apparent that the threading may he done at anv particular pitch.

l l hat claimed is:

a threaded section, a split nut i0;

lefai nteaaaimsee2215a a projection l. A threading machine involving a he i heed sg landle, a

nut for holding said 'nubin' threadedfengagement" with thethreaded section ofthe screw, said in'ut; septi'ons being iormgd intermediat thif" eiiges "to peimit engaggment bythe element- 120 hold the sections spread with relatioriitd flthe threadedsction of thg.

' p e a on iwith-mes zg t them;

- 2. A; It r'a dihg meme ihvbiiiiig a di head s indle, a starting screw" 01 fe edi ng' th sipi ntllelongitudinally, S.;l.id 'sgrew b'eir 1g vfornuaii. with 'qjpluralitynf threaded sections,- a splithufi for coii'pei'ation with each sectiqn,-the section s of t h mgtbeing forflmd with openings, and a stirmip to engage said opimings t'o-hqld thqsecgiongpf the nut in spread relation' with respectf t thg'sbtew. f

tions, a split nut ffir chdperi" Mimi wi'qh each 's'ectxon, thev sect-ions ofi-themlt; Ming. formef withopge'nin gs, and siri:up irjengzige said openings to hold thesectxons of the nut; in

by the (mtg: edges oi. the mit s eofizs (,0 hold said nut in scrgwicnggingposii iohl V in prsnc of two. witnesses Wicmmg;

v 4 Joni: 'MINDRUfl-I HENRY F. SCHMIDQEQ GEORGE HIZfOSLINi:

said stirrup being iidg t d be m 1: 3b." In testimony .ivhgre'of; I afiixmy signature 

